This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
artful' to 'verification-done-artful'. If the problem still exists,
change the tag 'verification-needed-artful' to 'verification-failed-
artful'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-artful

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https://bugs.launchpad.net/bugs/1770254

Title:
  [SRU][Artful] using vfio-pci on a combination of cn8xxx and some PCI
  devices results in a kernel panic.

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Artful:
  Fix Committed

Bug description:
  [Impact]
  Using vfio-pci on a combination of cn8xxx and some PCI devices results in a 
kernel panic. This is triggered by issuing a bus or a slot reset on the PCI 
device.

  [Fix]
  The following patches checks indicate that the reset is not possible
  preventing the kernel panic.
  357027786f35 PCI: Avoid bus reset if bridge itself is broken
  822155100e58 PCI: Mark Cavium CN8xxx to avoid bus reset
  33ba90aa4d44 PCI: Avoid slot reset if bridge itself is broken

  These patches are already in Bionic, we need these patches in Artful
  so that xenial linux-hwe also has the fix. The platforms of interest
  were certified with Xenial and linux-hwe, so we are interested in
  fixing this only in Artful.

  [Test]
  - Artful Host with Artful/bionic guests
  - Pass though PCI device (vfio-pci) from Artful to bionic and make sure its 
usable.
  - The device should pass through and not cause a kernel panic.

  A test kernel is available in ppa:manjo/lp1770254

  [Regression Potential]
  None.

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